Fire-pot.



No. 843,795. PATENTED FEB. 12, 1907.

' A. G. GRIPPS.

FIRE POT.

u-num UNITED @TAQTIE PATENT OFFICE.

ALFRED G. ORIPPS, OF AKRON, OHIO, ASSIGNOR TO THE PRUDENTIAL HEAT- INGCOMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO.

FIRE-POT.

Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed October 20,1906. Serial No. 339,809.

To all 1071/0122, it may concern.-

Be it known th at I, ALFRED G. Cnirrs, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented new and useful Improvements in FirePots, of which the followingis a specification.

This invention rel ates to fire-pots for boiler or warm-air furnaces andthe object thereof is to produce a simple and effectual device of theclass described so constructed as to evenly and perfectly distribute thenecessary oxygen to the burning fuel and wi .ich will permit of theready removal and replacement of those parts of the device which byreason of the intensity of the fire are most frequently burned out.

A further object of this invention when used in connection with a steamor hot-water boiler is to locate the fire in as close proximity to theboilensurface as possible and to increase the amount of boiler-surfaceexposed to the action of the fire as much as the limitations of a deviceof this kind will permit.

With the foregoing and other objects in view the invention consists ofthe novel construction, combination, and arrangement of partsconstituting the invention to be hereinafter referred to, andillustrated in the ac companying drawings, which form a part of thisspecification, in which is shown the preferred embodiment of theinvention; but it is to be understood that changes, variations, andmodifications can be resorted to which come within the scope of theclaims hereunto appended.

In the drawings, in which similar reference-numerals indicate like partsin the different figures, Figure 1 is a perspective view of the lowerportion of the fire-pot of a boiler containing my invention, withportions thereofomitted to better illustrate the construction of thebalance. Fig. 2 is a vertical section view of the fire-pot of a boiler,showing the internal arrangements of parts with respect to each other.

In the drawings the reference-numeral 1 designates the ash-pit of thedevice, which is provided with a clean-out door 2 and l as in its upperportion a preferably cylindrical opening 3, surrounded by a seat 4,inclosed by an upwardly-extending flange 5.

On thoseat 4c is mounted the lower end of a boiler, (designated by thereference-numeral 6,) or in the case of a hot-air furnace thefuelsection of a furnace is similarly mounted. In order to offer as muchof surface of the boiler to the action of the fire, I customarily formthe interior thereof with a plurality of upwardly-extending andpreferably parallel ribs or undulations 7, so that the spaces existingbetween these ribs or corrugations will con stitute means for thepassage of air upwardly around and through the mass of burning fuelsupported in the firepot. These ribs 7 do not extend to the seat 4, butterminate a short distance above, thereby forming a shoulder or insetportion 8. The portion of the boiler above the shoulder 8 constitutesthe upper portion of the fire-pot of this device, and the lower portionthereof is formed as follows: Attached to the inner surface of the seat4 by suitable holdfast devices 9 is a ring 10, provided at thedeterminate intervals with inwardly-projecting lugs 11, the inner endsof which are provided with a pair of holes 12, and at points equidistantbetween lugs 11 the ring 10 is further provided with inwardly-projectinglugs 13 for a purpose to be later described. That portion of a fire-potof this device which exists below the shoulder 8 is constructed of aplurality of segmental sections 18, each of which has a plurality ofslots extending upwardly from its base a'suflicient distance to formbetween them a plurality of downwardly-extending teeth 14. The two outerteeth, as well as the middle tooth of each section, are elongated, andthe outer teeth of each section are adapted to enter and rest in theoppositely-disposed openings 12 inadjacent lugs 11, and the middle toothof each section is adapted to rest on the centrally-disposed lugs 13,thereby securing and holding each section accurately in position andagainst unintentional displacement. V

The openings 12 in each lug 11 are spaced apart sufficiently to slightlyseparate the opposing ends of adjacent sections in order to permit theready removal and replacement of any one of these sections at any time.The openings 12 in the lugs 11 are situated such a distance inwardlyfrom the edge of the opening 3 in the top of the ash-pit 1 that asufficient space exists for the passage of air upwardly between the wallof the boiler-section and the rear face of the fire-pot sections, thuspermitting oxygen to pass through this ICC passage and upwardly betweenthe ribs 7 to the point of combustion in the fire-pot.

The fuel in the fire-pot is customarily supported by a rotatable grate15, provided with a central draw-gate 16, operated by an ordinary handle17; but as the construction of the grate forms no part of this inventiona further description of the same is believed to be unnecessary to theperfect understanding of this invention.

It will be noted that the construction just given affords a free andperfect means for sustaining the mass of fuel in the fire-potimmediately adjacent the lower portion of the boiler-section, and at thesame time a perfectly even and continuous supply of oxygen may besupplied to the fuel at all times. It will be further noted that if atany time any one of the fire-pot sections becomes worn or burnt out theymay be removed and new ones substituted without the necessity ofdismounting the boiler-section, access being readily had to the interiorof the fire-pot Ehrough the ordinary door by which fuel is ed.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1, The combination in a device of the class described,of an ash-pitprovided with an opening in the top thereof for establishingcommunication with the fire-pot of the device, a seat surrounding saidopening, a boiler or furnace section mounted on said seat provided withinwardly-projecting and upwardly-extending ribs terminating at a pointremoved from the bottom of said. section thereby forming an enlargedchamber below said ribbed portion, lugs supported by saidash-pitprojecting into the opening therein provided with perforations,segmental fire-pot sections each arranged to be mounted on adjoininglugs and extend therebetween and be substantially positioned within saidenlarged chamber.

2. The combination in a device of the class described, of an ash-pitprovided with an opening in the top thereof for establishingcommunication with the fire-pot of the device, a seat surrounding saidopening, a boiler or furnace section mounted on said seat, a pluralityof lugs each provided with a plurality of perforations supported by saidashpit and projecting into the openingthereof, and a plurality ofsegmental lire-pot sections each of which is provided with a pluralityof downwardly-extending pins arranged to enter said perforations wherebysaid sections may be positioned about the interior of said fire-pot.

my hand in presence of two subscribing witnesses.

ALFRED G. CRIPPS.

In testimony whereof I have hereunto set

